甲乙两个圆柱，体积比是16:25，底半径比是4:5，体积比是多少？
×× ×22× 10××．
列式计算．（1）的倒数与的积是多少？（2）100的倒数的是多少？（3）1.4加上它的倒数，再减去，结果是多少？
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口算显身手！= = = = == = = =
计算下面各题．40××608×27×．
×
×
×22×
10×
×
．
的倒数与
的积是多少？
是多少？
，结果是多少？
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×60
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